Thickness Dependence and Percolation Scaling of Hydrogen Production Rate in MoS2 Nanosheet and Nanosheet-Carbon Nanotube Composite Catalytic Electrodes
David McAteer,Zahra Gholamvand,Niall McEvoy,Andrew Harvey,Eoghan O’Malley,Georg S. Duesberg,Jonathan N. Coleman +6 more
Reads0
Chats0
TLDR
The performance of catalytic electrodes, fabricated from liquid exfoliated MoS2 nanosheets, can be optimized by maximizing the electrode thickness coupled with the addition of carbon nanotubes by finding the current, and so the H2 generation rate, at a given potential to increase linearly with electrode thickness to up ∼5 μm after which saturation occurs.Abstract:
Here we demonstrate that the performance of catalytic electrodes, fabricated from liquid exfoliated MoS2 nanosheets, can be optimized by maximizing the electrode thickness coupled with the addition of carbon nanotubes. We find the current, and so the H2 generation rate, at a given potential to increase linearly with electrode thickness to up ∼5 μm after which saturation occurs. This linear increase is consistent with a simple model which allows a figure of merit to be extracted. The magnitude of this figure of merit implies that approximately two-thirds of the possible catalytically active edge sites in this MoS2 are inactive. We propose the saturation in current to be partly due to limitations associated with transporting charge through the resistive electrode to active sites. We resolve this by fabricating composite electrodes of MoS2 nanosheets mixed with carbon nanotubes. We find both the electrode conductivity and the catalytic current at a given potential to increase with nanotube content as describ...read more
Citations
More filters
Journal ArticleDOI
Recent Advances in Electrocatalytic Hydrogen Evolution Using Nanoparticles.
TL;DR: The fundamentals of HER are summarized and the recent state-of-the-art advances in the low-cost and high-performance catalysts based on noble and non-noble metals, as well as metal-free HER electrocatalysts are reviewed.
Journal ArticleDOI
Non-Noble Metal-based Carbon Composites in Hydrogen Evolution Reaction: Fundamentals to Applications.
TL;DR: A detailed analysis of the structure-activity-pH correlations in the HER process gives an insight on the origin of the pH-dependence for HER, and provides guidance for future HER mechanism studies on non-noble metal-based carbon composites.
Journal ArticleDOI
Guidelines for Exfoliation, Characterization and Processing of Layered Materials Produced by Liquid Exfoliation
Claudia Backes,Claudia Backes,Thomas M. Higgins,Thomas M. Higgins,Adam G. Kelly,Conor S. Boland,Andrew Harvey,Damien Hanlon,Jonathan N. Coleman +8 more
TL;DR: In this paper, the authors discuss the rational behind a chosen experimental procedure in full detail using standard “Methods” sections due to the frequent use of procedures developed in related prior reports.
Journal ArticleDOI
Applications of Phosphorene and Black Phosphorus in Energy Conversion and Storage Devices
Jinbo Pang,Alicja Bachmatiuk,Yin Yin,Barbara Trzebicka,Liang Zhao,Lei Fu,Rafael G. Mendes,Rafael G. Mendes,Thomas Gemming,Zhongfan Liu,Zhongfan Liu,Mark H. Rümmeli +11 more
Journal ArticleDOI
A Commercial Conducting Polymer as Both Binder and Conductive Additive for Silicon Nanoparticle-Based Lithium-Ion Battery Negative Electrodes.
Thomas M. Higgins,Sang-Hoon Park,Paul J. King,Paul J. King,Chuanfang John Zhang,Niall McEvoy,Nina C. Berner,Dermot Daly,Aleksey Shmeliov,Umar Khan,Georg S. Duesberg,Valeria Nicolosi,Jonathan N. Coleman +12 more
TL;DR: Silicon nanoparticle-based lithium-ion battery negative electrodes where multiple nonactive electrode additives are replaced with a single conductive binder, in this case, the conducting polymer PEDOT PSS are described.
References
More filters
Journal ArticleDOI
Electronics and optoelectronics of two-dimensional transition metal dichalcogenides.
TL;DR: This work reviews the historical development of Transition metal dichalcogenides, methods for preparing atomically thin layers, their electronic and optical properties, and prospects for future advances in electronics and optoelectronics.
Book
Introduction to percolation theory
Dietrich Stauffer,Amnon Aharony +1 more
TL;DR: In this paper, a scaling solution for the Bethe lattice is proposed for cluster numbers and a scaling assumption for cluster number scaling assumptions for cluster radius and fractal dimension is proposed.
Journal ArticleDOI
The chemistry of two-dimensional layered transition metal dichalcogenide nanosheets
TL;DR: This Review describes how the tunable electronic structure of TMDs makes them attractive for a variety of applications, as well as electrically active materials in opto-electronics.
Journal ArticleDOI
Two-Dimensional Nanosheets Produced by Liquid Exfoliation of Layered Materials
Jonathan N. Coleman,Mustafa Lotya,Arlene O’Neill,Shane D. Bergin,Shane D. Bergin,Paul J. King,Umar Khan,Karen Young,Anne Gaucher,Sukanta De,Ronan J. Smith,Igor V. Shvets,Sunil K. Arora,George Stanton,Hye-Young Kim,Hye-Young Kim,Kangho Lee,Kangho Lee,Gyu Tae Kim,Georg S. Duesberg,Toby Hallam,John J. Boland,Jing Jing Wang,John F. Donegan,Jaime C. Grunlan,Gregory P. Moriarty,Aleksey Shmeliov,Rebecca J. Nicholls,J M Perkins,Eleanor M. Grieveson,Koenraad Theuwissen,David W. McComb,Peter D. Nellist,Valeria Nicolosi +33 more
TL;DR: It is shown that WS2 and MoS2 effectively reinforce polymers, whereas WS2/carbon nanotube hybrid films have high conductivity, leading to promising thermoelectric properties.
Journal ArticleDOI
Identification of active edge sites for electrochemical H2 evolution from MoS2 nanocatalysts.
Thomas F. Jaramillo,Kristina Pilt Jørgensen,Jacob Lindner Bonde,Jane Hvolbæk Nielsen,Sebastian Horch,Ib Chorkendorff +5 more
TL;DR: The active site for hydrogen evolution, a reaction catalyzed by precious metals, on nanoparticulate molybdenum disulfide (MoS2) is determined by atomically resolving the surface of this catalyst before measuring electrochemical activity in solution.
Related Papers (5)
Two-Dimensional Nanosheets Produced by Liquid Exfoliation of Layered Materials
Jonathan N. Coleman,Mustafa Lotya,Arlene O’Neill,Shane D. Bergin,Shane D. Bergin,Paul J. King,Umar Khan,Karen Young,Anne Gaucher,Sukanta De,Ronan J. Smith,Igor V. Shvets,Sunil K. Arora,George Stanton,Hye-Young Kim,Hye-Young Kim,Kangho Lee,Kangho Lee,Gyu Tae Kim,Georg S. Duesberg,Toby Hallam,John J. Boland,Jing Jing Wang,John F. Donegan,Jaime C. Grunlan,Gregory P. Moriarty,Aleksey Shmeliov,Rebecca J. Nicholls,J M Perkins,Eleanor M. Grieveson,Koenraad Theuwissen,David W. McComb,Peter D. Nellist,Valeria Nicolosi +33 more